Revert "commit at 9/9 16:40 of laptop setup"

This reverts commit fb1c06db67eefeb11754dfb3f9f5452c85a3b375.
Revert "Revert "commit at 9/9 16:40 of laptop setup""

This reverts commit eee223b1744d5c91346bc494e58100e6871a7ad0.
commit of laptop setup/step 2